《A3000时滞系统优化控制的研究》》-毕业论文.doc

PAGE A3000时滞系统优化控制的研究 摘要 时滞系统是一个难控系统，因为它的受控对象具有无穷维空间。为了解决这一难题，先后经历了PID控制，常规优化控制，智能优化控制等，但效果并不理想，原因是PID只是两维三参数的组合，与受控对象的维数明显有差别。因此，半个世纪以来，时滞系统的优化控制成为人们长期研究的热点和难点。本文基于北京华晟高科教学仪器有限公司提供的自动化过程控制实验室系统A3000中的锅炉滞后管出口温度作为研究对象，进行机理建模分析和实验建模分析，由于此对象具有大时滞特点，故采用ITAE二次优化控制作为整个系统的优化算法，确定系统控制方案，并在MATLAB/Simulink上进行仿真，验证其可行性和鲁棒性，并与传统的PID控制比较，结果表明，应用ITAE优化的理论，不仅能使设计出对控制信号而言具有快速平稳优良的性能指标，而且该系统对于参数扰动和负荷扰动都有强壮的抗干扰能力，从而获得总体满意的控制效果。在北京三维力控软件上进行系统组态，控制组态和显示组态，编写控制策略、脚本程序，并对温度时滞系统进行投运与参数整定，使系统的各项指标都能在期望的范围内。 关键词：时滞系统 ITAE二次优化 鲁棒性 力控控制策略 Abstract The time-delay system is a difficult control system, because its controlled object has an infinite dimensional space. To solve the problem, there has gone through the PID control, conventional optimal control, intelligent optimization control, but the effect is not ideal, because the PID is a combination of two-dimensional three-parameter, and the dimension of the controlled object is obviously different. Therefore， for half a century, optimal control of delay-time systems become hot and difficult long-term research. Hi-Tech Beijing Hua Sheng Based Teaching Instrument Co., Ltd. to provide automated process control laboratory system A3000 delay in the outlet temperature of the boiler as the research object, The mechanism modeling and experimental modeling analysis, the characteristics of this object has large time delay, so ITAE optimal control using quadratic optimization algorithm as a whole system to determine the system control program, and MATLAB / Simulink simulation on to verify its feasibility and robustness, and compared with the traditional PID control, the results show that the optimal application of ITAE theory, not only make the design of the control signal, the fast and smooth with excellent performance, but also for the parameters of the system disturbance and load disturbance has a strong anti-interference ability to gain control of the overall satisfactory results. Three-dimensional force in Beijing, the control strategy, con